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authorDan Williams <dan.j.williams@intel.com>2018-07-13 21:50:37 -0700
committerDave Jiang <dave.jiang@intel.com>2018-08-20 09:22:45 -0700
commitc953cc987ab87d180e1d5de2f1c217abe33aac77 (patch)
tree29e82381bba655d2141bf39c261312b56d128442 /arch/x86/mm
parent284ce4011ba60d6c487b668eea729b6294930806 (diff)
download96b-common-c953cc987ab87d180e1d5de2f1c217abe33aac77.tar.gz
libnvdimm, pmem: Restore page attributes when clearing errors
Use clear_mce_nospec() to restore WB mode for the kernel linear mapping of a pmem page that was marked 'HWPoison'. A page with 'HWPoison' set has also been marked UC in PAT (page attribute table) via set_mce_nospec() to prevent speculative retrievals of poison. The 'HWPoison' flag is only cleared when overwriting an entire page. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'arch/x86/mm')
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